Why does USCIS say my partner doesn’t meet the requirements for I-864?

You will not win by arguing with USCIS on this one - will waste months unnecessarily while the processing of your EAD and I-131 AP doc. is placed...

You must stop working now and can only resume once receive the EAD.

You have to be truthful and answer this question "yes." It is your responsibility to locate the court record and bring the final case...

Immigration?

That non-USCIS contractor was mistaken and clueless indeed...

Can I withdraw my N400 Application Based on 3-year Eligibility if Marriage Didn't Work Out?

Yes, you certainly may and should, if things really cannot be worked out between you two.

You will need to be patient and wait for the second interview notice. Hoperully the "decision" will be made on the spot, if not the 120 day...

Why do my case need additional review?

I agree. It is simply not possible to provide a decent answer on these confusing set of facts.

My I-765 application is denied as I didn't appear for asylum interview,Can I re-apply for I-765 instead of filing I-290-B?

No - now that the "clock" has been stopped you are no longer eligible to simply apply for EAD again.

The admission stamp in your passport will do as well as the I-94. If already have one, then no need to struggle to obtain the second one.

I am on a J-1 and l have the two rule, what work/residence Visa should be best if i have the rule waived off?

Impossible to determine/decide from here. You need to consult with an attorney directly.